Eduard ullrich



UNITED STATES PATENT OFFICE.

EDUARD ULLRIOH, OF HOOHST-ON-THEMAIN, GERMANY, ASSIGNOR TO THE FARBVERKE, VORMALS MEISTER, LUCIUS 8t BRUNING, OF SAME PLACE.

BLUE COLORING-MATTER FORMED BY THE ACTION OF PARANlTROSO-DIPHENYLAMINES ON PHENOLS 0R OXYCARBONIC ACIDS.

SPECIFICATION forming part of Letters Patent No. 366.356, dated July 12, 1887.

(No specimens.)

To all whom it may concern.-

Be it known that I, EDUARD ULLRICH, doctor of philosophy, a citizen of the Empire of Germany, residing at Hdchston-the-Main, in

5 the Empire of Germany, haveinvented certain new and useful Improvements in Blue Coloring-Matter; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to the manufacture of blue coloring-matter or dyestuff by the action of paranitroso diphenylamine on phenols or I 5 oxycarbonic acids.

In carrying out my invention I proceed as follows: The paranitroso-diphenylamine by treatment of the same with alcoholic hydro- 25 chloric acid. To five parts of the chlorhyd rate of paranitrosodiphenylamine and eight parts of gallic acid are added fifty parts of acetic acid (of twenty per cent.) and heated in a water bath until the mass has taken ablue coloring. Now the product is poured into cold 3? water, the blue coloring-n1atter, which has separated, filtered off and washed with water.

The coloring-matter is in form ofa dark-blue paste. It is insoluble in cold water, soluble with difficulty in hotwater. Invdyeing, as 5 well as in printing, it is fixed on the fiber by means of chrome or iron mordants, with the addition of acetate of lime.

NVhat I claim as new, and desire to secure by Letters Patent, is-

As a new manufacture, the blue coloringmatter or dye-stuff produced by the action of paranitroso-diphenylamine on phenols or oxycarbonic acids, substantially as described.

In testimony whereof I affix my signature in 45 presence of two witnesses.

EDUARD ULLRIOH.

Witnesses:

ALVEs'ro S. HOGUE, J EAN GRUND. 

